Watson described the purpose of psychology as: âTo predict, given the stimulus, what reaction will take place; or, given the reaction, state what the situation or stimulus is that has caused the reactionâ (1930, p. 11). * All behavior is learnt from the environment.
Additional tests including penetration,solubility, and ductility are made on the residue. Cutback asphalt grades and tests There are several grades for each of the three types ofcutbacks â rapid curing (RC), medium curing (MC), andslow curing, (SC). The grades include 70, 250, 800, and3000.
This section of the manual covers the materials used in quality hot-mix asphalt pavements. - what they are, how they behave, and how to tell whether or not particular materials are. suitable for a paving project. Asphalt concrete is composed of two components, aggregates. and asphalt. Aggregates are generally classiï¬ed into two groups, ï¬ne and coarse, and. normally constitute from 90 to 95 percent by weight of the total mixture. The asphalt is. composed of a Performance Graded (PG) binder or some variation of PG binder, and.